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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:42 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Simplified modeling of the dynamics of the ions in liquid argon detectors
Authors:
Andrei VARIU, Ionel LAZANU
Affiliation:
University of Bucharest, Faculty of Physics, POBox MG-11, Bucharest-Magurele, Romania
E-mail
variuandrei@yahoo.com
Keywords:
TPC, double phase detectors, dynamics of charge carriers
Abstract:
Noble gas detectors become popular due to their specific characteristics of producing scintillations and ionizations. Argon and xenon as TPC detectors are used in experiments aiming to detect neutrinos and dark matter (through WIMPs). Argon is also an important option for the next generation of detectors, e.g the mega science detector DUNE.Starting from the model developted by Romero and co-workers [1] for double phase detectors (liquid and gas) we investigated the electric field distribution, electronic and ionic current densities as functions of position, the cathode voltage required to obtain a certain value for the electric field near the anode and the secondary recombination probabilities. The maximum drift lengths considered are from 1 meter (corresponding to the Pilot detector of DUNE) up to 20 meters (GLACIER option). In double phase detectors, when the electrons reach the gaseous phase, they can be multiplied in avalanche. In this process, the resulting positive ions may re-enter in the liquid phase, disturbing the electric field and increasing the chance of secondary recombination. Numerical results are presented.
References:
[1] Luciano Romero, Roberto Santorelli, Bárbara Montes, Astroparticle Physics 92 (2017) 11–20
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